Combined door hanger and track.



MORITZ VON ROER, OF JENA, GERMANY, ASSIGNDR TO-THE ATENT 0 FICE.

FIRM 0F CARL ZEISS, OF

JENA, GERMANY.

TORIC SPECTACLE-GLAS S.

V Spgcification of Letters Patent.

Application filed August 25, 1910. Serial No.

ramme Apr. 18, 1911. 578,863.

wh ch are intended, to. compensat the astigmatic. defectof an eye. butopposite astigmatism, namely to toric glasses, both sphero-toric andbitoric. In the sphero-toric glasses the center of the spherical surfacelies in. the. equatorial plane of the toric surface. The of the-glasslies in this equatorial plane, contains the above mentioned center andintersects the axis of the toricsurface- With, the: bi-toric glasses twocases are to be distinguished. The axes of the tWot-oric surfaces canlie parallel to each other. But they can also cross one another atrightangles. In the case of the effect of its parallel axes theequatorial plane is common to both surfacsand the. axis of the glasslies in this plane and intersects the axes of i both surfaces. In thecase of the axes which cross one an0ther"at-,ri,ght angles, the twoequatorial planes are perpendicular to each other. of the glass. Alltoric glasses belong to the lei-symmetrical ones, 2'. e. to those withtwo planes of symmetry, which intersect at right angles the axis of theglass. With the sp'ero-toric glasses and the, bi-toric ones withparallel axes, the one plane of symmetry is formed by the equatorialplane of the toric surface or surfacesrespectively, the other by thatmeridional plane of the toric' surface or surfaces respectively whichcontains the axis of the glass. With the bitoric glasses, in which theaxes of the toric surfaces cross one another at right angles, the twoequatorial planes of these surfaces rep resent the planes of symmetry.

he object of the-invention is to bring the deficient optical effect ofthe zones of the toric glass as near as possible to the correct vertexplace. From this correct effect, according to the investigations whichled't o the invention, the average efi'e'ctof a means si nilar ltlIG'lIltQIBCtECl the Their line of intersection is the axis 1 zone, ineach toric spectacle glass, deviates l more than the mean. of the twoeffects, which i appertaln to two places of the zone, chosen as will benow described. For. this choice, the flour places come into,consideration, in which t e. i As the diametrically equal intheireffect,

1 concerns either one of opposed p aces. ar the above propositionthejtwo places, which one, and either one of I the two places, which areintersected by the planes of symmetry-intersect the zonei other plane ofsymmetry. Further, the averj ageefiect of a zone is so much the better,it approximates so much nearer to the'eflect of the vertex place, theless the mean of the two effects of two placesin this; zone, chosen asstated, deviates from the effect of the verteX places, this meanaccording to the first proposition, always better than that averageeffect.

| In order to ascertain the eifect of a place,

which belongs to'a plane of symmetry, the place is to be considered asone through which a principal ray passes'wlnch travels in the plane ofsymmetry an intersects the 1 axis about 3 cm. behind the eye side vertexi of the spectacle glass, 71. 6. wherein theprac- I tical use of thespectacle glass the pomt of rotation of the eye is situated. In the verl tex place of the glass, which belongs to both planes of symmetry, theaxis represents the i principal ra-y. For any place whatever 111 thetoric spectacle glass the optical-effect re- 1 s'ults from the twodifferent powers, wh ch are effective in the two principal planeslonging to the principal ray. The pr nc pal 1 planes are perpendicularto each other, as l is well-known. When the place under-considerationlies in a plane of symmetry, this I plane represents the one principalplane. I For the 'vertex place both planes of symmetry become principalplanes. Iffor a in one of-the 1 place outside the vertex, lyini' e twopowers two planes of symmetry, of t l the one, which is efi'ective insymmetry, were just as great as the RQWQt',

which is efiective in the same plane at the vertex place, and if furtherfor t e place an- I der consideration theother p ower, which,

according to the above, is :fifiCfllfe in ajplan" this plane of -ADOLPHE. RUPP, OF'CHICAGO,

ILLINOIS.

COMBINED DOOR HANGER AND TRACK.

Specification of Letters Patent. Patented Apr. 18, 1911.

"Applicatio'n'filed August 24, 1910. Serial No. 578,709.

To all whom it may concern:

Be it known that I, AnoLPH E. RUPP, a citizen of the UnitedStates,residing a't Ohicago, in-the county of Cook and Stateof Illinois, haveinvented a new and useful Combined Door Hanger and Trackfo'f which thefollowing'is a specification.

This invention relates 'to tracks and hangers for use in connectiontherewith.

The principal object of the present invention is to ;provide a novelform ofsupport for a door ofthis character, saidsupporting "structurebeing practically indestructible and "the "parts thereof cooperating toprevent thedoor from becoming separated from its track and to alsoprevent said 'door from swinging laterally to an objectionable extentshould "the bottom guard of the door become detached from any-cause.

A further obje'ct is to provide a combined supporting rail and housingwhich is of very simple construction and which serves to keep thesupporting wheels constantly under cover w'heretheir movements will notbe interfered with *by ice, dust, etc.

A still "further'object is to provide means whereby thedoor may be heldentirely open or closed and without danger of "moving backand "forthwhen not fastenedin either of these positions.

With the foregoing and other objects in View, the invention consists ofcertain novel details of construction and combinations of partshereinafter more fully described and pointed out in the claims.

In the accompanying drawings, the preferred forms of the invention havebeen shown.

In said drawings-Figure l is-a side elevation of a portion of a carhaving the pres section through a vertically sliding door and showingthe present improvements combined therewith.

Referring to the figures by characters of reference G designates aportion of a car structure having a door opening g. Secured to said carstructure, above the door opening is a door supporting track formed froma hp 5,there being a space between said lip 5 v and the plate 1 and saidplate being adapted tobej secured to'the wall of the car andconstituting the inner wall of the track. The curved portion 2 forms awater shed, the downwardly extending portion 3 forms the outer wallofthe track, and the upturnedlip 5constitutes'the wheel treador rail.

An upstanding stop strip 6 is secured to the car structure at one sideof the opening 9 and the upper end of this strip fits snugly betweenoneend portion of the side plate 1 and the rail 5 and a stop'block 7 isseated between the upper end of this strip 6 and the portion 3, thisblock fitting snugly between the rail 5 and the flange, as clearly shownin Fig. 5. The other end of the supporting track which is made up of theplate 1 and the portions 2, 3, 4 and 5,'is closed by a stop block 8which fits snugly between the parts and is preferably held in place bymeans of one of the bolts 9 which is utilized for the purpose of holdingthe supporting track to the car structure. The upper "or bearing edge ofthe rail 5 is provided, adjacent the blocks 7 and 8, with shallowrecesses 10 and 11, respectively, and another recess 12 is formed in thesaid edge at a point equi distant from the recesses 10 and 11.

A guard strip 13 is arranged along the car structure and below thedooropening 9, this strip being attached, at one end, to the bottom portionof the upstanding stop strip 6, and, at its other end, to the carstructure at a point below the stop block 8. The strip 13 is spaced fromthe car structure intermediate said points, a distance slightly greaterthan the thickness of the car door H, this door being arranged with itslower edge between the car structure and the guard strip 13 while itsupper edge is disposed close to the inwardly curved portion 4 of thetrack and bears against the lower portion of the plate 1. A hanger 14:is secured to the outer face of the door H close to each end of theupper edge portion thereof, and each of these hangers is bent partlyacross the up per edge of the door, as shown at 15 in Fig. 2, and isthen extended upwardly through the space between the plate 1 and therail 5.

Figs. 15 and 16.

7 mm. (l -1.9 mm. .e0

r u=48.0 mm. 1 =65.6 mm.

M +4. 00 dptr. +3. 90 dptr. +3. 71 dptr.

A +1.02 +0.98 +0.91 M A 2.98 3. 3.15

M -M 0.00 0.14 0.35 =0.12 (M-A) A --A 0.00 0.10 0.34 =01). (M-A) Figs. 1and M= +4 dptr. A: +1 (lptr. 1 ==50.8 mm. r w-96.00 1 q=81.7 mm. 2=115.8mm.

.9 m w'= 0.00 23.93 35. 00 M +4. 00 dptr. +3. 04 dptr +3. 80 dptr A+1.00 0.80 0.05 M A 3.00 3.08 3.12 M +4.00 +4.08 +4. 16 A +1.00 +1.04+1.06 M -A 3.00 3.04 3.10 f.

M"M"= 0.00 0.14 0.36 =0.12 (M-A) A -A 0.00 0.18 0.38 =0.13 (M-A) Figs.23 and 2/.

' M== +4 dptr. A= +1 dptr. r =40.0 mm. m=67.0 mm. 9 F604 nun. 7"'2=7G.0mm.

d==1.9 mm. w== 0. 00 23.93 35. 00

I M +4.00 dptr. +3. 78 dptr. +3.49 dptr.

A +1.00 +0. 75 +0.40 M -A 3.00 3.03 3.03 M +4.00 +3.98 +3. 95 A: +1.00+0.96 +0. J0 M=A 8.00 3.02 8.05 M -M 0.00 0.20 0.46 =0.15 M-A) 0.00-0.21 0.44 =0. 15 M-A) I claim: 1. Toric' s ectacle, glass, in which thepowers eifeetive inthe laces of the marginal zone, through whichpass'two principal rays trayeling respectively in the one and the otherplane of'synn'netry' and intersecting at the same inclination to theaxis 2. Toric spectacle glass, in which the powers efiective in theplaces of. the marginal zone, through which pass two prin cipal raystraveling respectively'in the one and the other plane of symmetry andintersecting at the same inclination to the axis in the same axis point,about 3 cm. behindthe vertex on theeye side, have such values, that thedifference between that one of the two-powers of one of the two places,which is effective in the plane ofsynnnetry intersecting this place, andthe power of the other place, being effective in the principal planeperpendicular to that plane of sym-. metry, which intersects this otherplace, amounts to the fifth part at the most of the astiglnaticdifference at the vertex, the ast-igmat-ic difference at one place andthat at the other place being the same.

MORITZ VON ROHR. \Vit'nesses PAUL KRIJGER, ALFRED MEoKnDANz.

Copies 01' this patent may he obtained forfive cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

